Dear Mr. Secretary:1 It has long been recognized that to assist the Congress in achieving its legislative purposes every Executive Department or Agency must, upon the request of a Congressional Committee, expeditiously furnish information relating to any matter within the jurisdiction of the Committee, with certain historical exceptions--some of which are pointed out in the attached memorandum from the Attorney General.2 This Administration has been and will continue to be diligent in following this principle. However, it is essential to the successful working of our system that the persons entrusted with power in any one of the three great branches of Government shall not encroach upon the authority confided to the others. The ultimate responsibility for the conduct of the Executive Branch rests with the President.
Within this Constitutional framework each branch should cooperate fully with each other for the common good. However, throughout our history the President has withheld information whenever he found that what was sought was confidential or its disclosure would be incompatible with the pubic interest or jeopardize the safety of the Nation.
Because it is essential to efficient and effective administration that employees of the Executive Branch be in a position to be completely candid in advising with each other on official matters, and because it is not in the public interest that any of their conversations or communications, or any documents or reproductions, concerning such advice be disclosed, you will instruct employees of your Department that in all of their appearances before the Subcommittee of the Senate Committee on Operations regarding the inquiry now before it, they are not to testify to any such conversations or communications or to produce any such documents or reproductions. This principle must be maintained regardless of who would be benefited by such disclosures.
I direct this action so as to maintain the proper separation of powers between the Executive and Legislative Branches of the Government in accordance with my responsibilities and duties under the Constitution. This separation is vital to preclude the exercise of arbitrary power by any branch of the Government.
By this action I am not in any way restricting the testimony of such witnesses as to what occurred regarding any matters where the communication was directly between any of the principals in the controversy within the Executive Branch on the one hand and a member of the Subcommittee or its staff on the other. Sincerely